Mesh generation with a standardized headform for CFD simulations of particle aspiration

Zhipeng Lei, James Yang

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

The aspiration of contaminated airborne particles is a big concern for healthcare workers. Computational Fluid Dynamics (CFD) method has been widely used to simulate breathing airflow and particle aspiration. In CFD simulations of particle aspiration, digital human heads have been integrated into chamber models for mesh generation. Facial dimensions influence the breathing flow pattern and the particle aspiration in the literature; however the existing CFD studies have never included standardized headforms developed from an anthropometric survey of a large American worker population. This study proposed a CFD mesh generation method for particle aspiration simulations based on a medium size standardized headform. The medium headform is one of five National Institute for Occupational Safety and Health (NIOSH) standardized headforms that represent U.S. healthcare workers. To simulate a headform sitting in the middle of a chamber, the volume between the headform and the chamber was meshed. A boundary layer of prism elements covered the headform surface, and a tetrahedral mesh filled the rest of the volume. As an application of the CFD meshes, CFD simulations for particle aspiration were conducted. Velocity fields in the chamber, inhalation flow patterns, and aspiration efficiencies were determined. Further, a grid independency study verified the simulation results and the quality of the CFD meshes.

Original languageEnglish
Title of host publication35th Computers and Information in Engineering Conference
PublisherAmerican Society of Mechanical Engineers (ASME)
ISBN (Electronic)9780791857045
DOIs
StatePublished - 2015
EventASME 2015 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference, IDETC/CIE 2015 - Boston, United States
Duration: Aug 2 2015Aug 5 2015

Publication series

NameProceedings of the ASME Design Engineering Technical Conference
Volume1A-2015

Conference

ConferenceASME 2015 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference, IDETC/CIE 2015
CountryUnited States
CityBoston
Period08/2/1508/5/15

Keywords

  • Computational fluid dynamics
  • Headform
  • Mesh generation

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    Lei, Z., & Yang, J. (2015). Mesh generation with a standardized headform for CFD simulations of particle aspiration. In 35th Computers and Information in Engineering Conference (Proceedings of the ASME Design Engineering Technical Conference; Vol. 1A-2015). American Society of Mechanical Engineers (ASME). https://doi.org/10.1115/DETC2015-47205